springMVC框架(简单登录实例)

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springMVC框架(简单登录实例)

2013年06月22日 ⁄ 综合 ⁄ 共 7002字 ⁄ 字号小中大 ⁄ 评论关闭

本次工程结构图

Spring 1 视图层.jsp

<%@
page language="java"
import="java.util.*"
pageEncoding="utf-8"%>

String path = request.getContextPath();

String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";

<!DOCTYPE
HTML PUBLIC
"-//W3C//DTD HTML 4.01 Transitional//EN">

<html>

<head>

<title>My JSP 'index.jsp' starting page</title>

<!--

-->

</head>

<body>

用户名：<input
type=text
name="username"/><br>

密码：<input
type=text
name="password"/><br>

</form>

</body>

</html>

error.jsp

<%@
page language="java"
import="java.util.*"
pageEncoding="utf-8"%>

String path = request.getContextPath();

String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";

<!DOCTYPE
HTML PUBLIC
"-//W3C//DTD HTML 4.01 Transitional//EN">

<html>

<head>

<title>My JSP 'error.jsp' starting page</title>

<!--

-->

</head>

<body>

十分对不起，登录失败，由于：<%=request.getAttribute("msg")
%>

</body>

</html>

success.jsp

<%@
page language="java"
import="java.util.*"
pageEncoding="utf-8"%>

String path = request.getContextPath();

String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";

<!DOCTYPE
HTML PUBLIC
"-//W3C//DTD HTML 4.01 Transitional//EN">

<html>

<head>

<title>My JSP 'success.jsp' starting page</title>

<!--

-->

</head>

<body>

恭喜：<%=request.getAttribute("username")
%>,登录成功

</body>

</html>

Spring 2.控制层

package com.spring.controller;

import java.util.HashMap;

import java.util.Map;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import org.springframework.web.servlet.ModelAndView;

import org.springframework.web.servlet.mvc.Controller;

import com.spring.model.UserInfoBean;

publicclass LoginController
implements Controller {

private String
successPage;

private String
errorPage;

//private UserInfoBean userInfoBean;

public String getSuccessPage() {

returnsuccessPage;

}

publicvoid setSuccessPage(String successPage) {

this.successPage = successPage;

}

publicvoid setErrorPage(String errorPage) {

this.errorPage = errorPage;

}

private String getErrorPage() {

returnerrorPage;

}

public ModelAndView handleRequest(HttpServletRequest request,

HttpServletResponse response)
throws Exception {

String username=request.getParameter("username");

String password=request.getParameter("password");

String message=null;

if(username==null||password==null||username.trim().equals("")||password.trim().equals(""))

{

message="
用户名或者密码为空";

Map<String,String> model=new HashMap<String,String>();

model.put("msg", message);

returnnew ModelAndView(getErrorPage(),model);

}

if(!UserInfoBean.exisitUser(username)){

message=username+"不存在";

Map<String,String> model=new HashMap<String,String>();

model.put("msg", message);

returnnew ModelAndView(getErrorPage(),model);

}

if(!UserInfoBean.confirmPassword(username,password)){

message=username+"密码不正确";

Map<String,String> model=new HashMap<String,String>();

model.put("msg", message);

returnnew ModelAndView(getErrorPage(),model);

}

else

{Map<String, String> model=new HashMap<String,String>();

model.put("username",username);

returnnew ModelAndView(getSuccessPage(),model);

}

// public UserInfoBean getUserInfoBean() {

// return userInfoBean;

// }

// public void setUserInfoBean(UserInfoBean userInfoBean) {

// this.userInfoBean = userInfoBean;

// }

}

Spring 3.模型层

package com.spring.model;

import java.util.HashMap;

import java.util.Map;

publicclass UserInfoBean {

privatestatic Map<String,String>userinfo=new
HashMap<String,String>();

static

{

String numberOneUser="zhangsan";

String numberOnePassword="123";

String numberTwoUser="lisi";

String numberTwoPassword="456";

userinfo.put(numberTwoUser, numberTwoPassword);

userinfo.put(numberOneUser, numberOnePassword);

}//判断一个用户名是否存在

publicstaticboolean exisitUser(String username){

returnuserinfo.containsKey(username);

}

publicstaticboolean confirmPassword(String username,String
password)

{returnuserinfo.get(username).equals(password);

}

Spring 编写配置文件：

Web.xml

<?xml
version="1.0"
encoding="UTF-8"?>

<web-app
version="2.5"

xmlns="http://java.sun.com/xml/ns/javaee"

xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

xsi:schemaLocation="http://java.sun.com/xml/ns/javaee

http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">

这里配置spring
的后台servlet

<servlet-name>dispatcherServlet</servlet-name>

<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>

指定spring配置文件的路径

<init-param>

<param-name>contextConfigLocation</param-name>

<param-value>/WEB-INF/classes/applicationContext.xml</param-value>

</init-param>

<load-on-startup>1</load-on-startup>

</servlet>

拦截所有以.do结尾的请求，可以修改

<servlet-mapping>

<servlet-name>dispatcherServlet</servlet-name>

<url-pattern>*.do</url-pattern>

</servlet-mapping>

<display-name></display-name>

<welcome-file-list>

<welcome-file>login.jsp</welcome-file>

</welcome-file-list>

</web-app>

Spring applicationContext.xml

<?xml
version="1.0"
encoding="UTF-8"?>

<beans

xmlns="http://www.springframework.org/schema/beans"

xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

xmlns:p="http://www.springframework.org/schema/p"

xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.0.xsd">

<props>

<prop
key="login.do">login</prop>

</props>

</property>

</bean>

<value>error.jsp</value>

</property>

<value>success.jsp</value>

</property>

</bean>

</beans>

【上篇】for_each stl http://www.cplusplus.com/reference/algorithm/for_each/(转载）
【下篇】大整数除法

作者: roost

该日志由 roost 于11年前发表在综合分类下，最后更新于 2013年06月22日.
转载请注明: springMVC框架(简单登录实例) | 学步园 +复制链接

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springMVC框架(简单登录实例)

作者: roost

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